Pence's doctor resigns after reports of concerns about Jackson's conduct

The White House physician assigned to Vice President Mike Pence, Jennifer Pena, has resigned, his office told reporters in a statement on Friday. Pena worked in the White House Medical Unit.

"The vice president's office was informed today by the White House Medical Unit of the resignation. Physicians assigned to the vice president report to the White House Medical Unit and thus any resignation would go entirely through the Medical Unit, not the vice president's office," Alyssa Farah, Pence's press secretary, according to the statement said to CNN.